diff --git a/README.md b/README.md
index 5d5acbb..80d5448 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,6 @@
 
 ## Instructions
 1. Create an ExoPlaSim model
-2. Save it as model.py
-3. Set the `$MODEL` environment variable to the directory containing your model.py
-4. Run the docker container with `docker compose run -it --rm exoplasim`
-
+2. Save it somewhere with the filename `model.py`
+3. Edit the `.env` file and add the directory containing `model.py` after `MODEL=`
+4. Run the docker container (eg. `docker compose run -it --rm exoplasim`)
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